A Printed Ultra-Wideband Diversity Antenna

A printed ultra-wideband (UWB) antenna operating at a frequency range of 3.1-5.8 GHz is proposed for diversity applications. The antenna consists of two orthogonal half circles with the radiators placed symmetrically with respect to a protruded T-shaped ground plane, which has a slot at the upper centre portion of the ground plane. The simulated and measured results show that across the operating bandwidth, the antenna can achieve spatial diversity with good isolation. In addition, a parametric study has been conducted to investigate the effects of the slot and ground plane size on the impedance matching and isolation.